Problem in modifying user exit ECC6.0
I have one problem in ECC6.0.I am trying to change an User Exit 'ZXCO1U01' in ECC6.0. but while changing it is not allowing me to write anything.Even I pressed the button insert and replace but still i m not able to write.
Can anybody help me out,to achieve this.
You can do Edit -> Modification Operations -> Switch Off Modification assistant and then try changing it.